Subclass exceptions from standard library exceptions

[Schamper]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 88.88889% with 1 line in your changes missing coverage. Please review.

Project coverage is 88.75%. Comparing base (21c1617) to head (402b723).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
dissect/jffs/jffs2.py	80.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main       #9   +/-   ##
=======================================
  Coverage   88.75%   88.75%           
=======================================
  Files           4        4           
  Lines         249      249           
=======================================
  Hits          221      221           
  Misses         28       28           

Flag	Coverage Δ
unittests	88.75% <88.88%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

---

🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests

[Schamper]

Failing tests are due to recent dissect.cstruct changes

[Schamper]

@JSCU-CNI due to new behaviour in cstruct with how we deal with None values, the method used here for lost+found detection no longer worked. Let me know if you find my fix appropriate: e4a4fc1